angular2
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Angular 2 - a web framework for modern web apps
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JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") return Reflect.decorate(decorators, target, key, desc);
switch (arguments.length) {
case 2: return decorators.reduceRight(function(o, d) { return (d && d(o)) || o; }, target);
case 3: return decorators.reduceRight(function(o, d) { return (d && d(target, key)), void 0; }, void 0);
case 4: return decorators.reduceRight(function(o, d) { return (d && d(target, key, o)) || o; }, desc);
}
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
return function (target, key) { decorator(target, key, paramIndex); }
};
import { CONST_EXPR } from 'angular2/src/facade/lang';
import { StringMapWrapper } from 'angular2/src/facade/collection';
import { EventEmitter, ObservableWrapper } from 'angular2/src/facade/async';
import { Directive } from 'angular2/src/core/metadata';
import { forwardRef, Provider, Inject, Optional } from 'angular2/src/core/di';
import { NgControl } from './ng_control';
import { NG_VALIDATORS, NG_ASYNC_VALIDATORS } from '../validators';
import { NG_VALUE_ACCESSOR } from './control_value_accessor';
import { setUpControl, composeValidators, composeAsyncValidators, isPropertyUpdated, selectValueAccessor } from './shared';
const formControlBinding = CONST_EXPR(new Provider(NgControl, { useExisting: forwardRef(() => NgFormControl) }));
/**
* Binds an existing {@link Control} to a DOM element.
*
* ### Example ([live demo](http://plnkr.co/edit/jcQlZ2tTh22BZZ2ucNAT?p=preview))
*
* In this example, we bind the control to an input element. When the value of the input element
* changes, the value of the control will reflect that change. Likewise, if the value of the
* control changes, the input element reflects that change.
*
* ```typescript
* @Component({
* selector: 'my-app',
* template: `
* <div>
* <h2>NgFormControl Example</h2>
* <form>
* <p>Element with existing control: <input type="text"
* [ng-form-control]="loginControl"></p>
* <p>Value of existing control: {{loginControl.value}}</p>
* </form>
* </div>
* `,
* directives: [CORE_DIRECTIVES, FORM_DIRECTIVES]
* })
* export class App {
* loginControl: Control = new Control('');
* }
* ```
*
*##ng-model
*
* We can also use `ng-model` to bind a domain model to the form.
*
* ### Example ([live demo](http://plnkr.co/edit/yHMLuHO7DNgT8XvtjTDH?p=preview))
*
* ```typescript
* @Component({
* selector: "login-comp",
* directives: [FORM_DIRECTIVES],
* template: "<input type='text' [ng-form-control]='loginControl' [(ng-model)]='login'>"
* })
* class LoginComp {
* loginControl: Control = new Control('');
* login:string;
* }
* ```
*/
export let NgFormControl = class extends NgControl {
constructor(_validators, _asyncValidators, valueAccessors) {
super();
this._validators = _validators;
this._asyncValidators = _asyncValidators;
this.update = new EventEmitter();
this.valueAccessor = selectValueAccessor(this, valueAccessors);
}
onChanges(changes) {
if (this._isControlChanged(changes)) {
setUpControl(this.form, this);
this.form.updateValueAndValidity({ emitEvent: false });
}
if (isPropertyUpdated(changes, this.viewModel)) {
this.form.updateValue(this.model);
this.viewModel = this.model;
}
}
get path() { return []; }
get validator() { return composeValidators(this._validators); }
get asyncValidator() { return composeAsyncValidators(this._asyncValidators); }
get control() { return this.form; }
viewToModelUpdate(newValue) {
this.viewModel = newValue;
ObservableWrapper.callNext(this.update, newValue);
}
_isControlChanged(changes) {
return StringMapWrapper.contains(changes, "form");
}
};
NgFormControl = __decorate([
Directive({
selector: '[ng-form-control]',
bindings: [formControlBinding],
inputs: ['form: ngFormControl', 'model: ngModel'],
outputs: ['update: ngModelChange'],
exportAs: 'form'
}),
__param(0, Optional()),
__param(0, Inject(NG_VALIDATORS)),
__param(1, Optional()),
__param(1, Inject(NG_ASYNC_VALIDATORS)),
__param(2, Optional()),
__param(2, Inject(NG_VALUE_ACCESSOR)),
__metadata('design:paramtypes', [Array, Array, Array])
], NgFormControl);
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